The University of Southampton
University of Southampton Institutional Repository

Vapor/vapor-solid interfacial growth of covalent organic framework membranes on alumina hollow fiber for advanced molecular separation

Vapor/vapor-solid interfacial growth of covalent organic framework membranes on alumina hollow fiber for advanced molecular separation
Vapor/vapor-solid interfacial growth of covalent organic framework membranes on alumina hollow fiber for advanced molecular separation

Covalent organic frameworks (COFs), known for their chemical stability and porous crystalline structure, hold promises as advanced separation membranes. However, fabricating high-quality COF membranes, particularly on industrial-preferred hollow fiber substrates, remains challenging. This study introduces a novel vapor/vapor-solid (V/V−S) method for growing ultrathin crystalline TpPa-1 COF membranes on the inner lumen surface of alumina hollow fibers (TpPa-1/Alumina). Through vapor-phase monomer introduction onto polydopamine-modified alumina at 170 °C and 1 atm, efficient polymerization and crystallization occur at the confined V−S interface. This enables one-step growth within 8 h, producing 100 nm thick COF membranes with strong substrate adhesion. TpPa-1/Alumina exhibits exceptional stability and performance over 80 h in continuous cross-flow organic solvent nanofiltration (OSN), with methanol permeance of about 200 L m−2 h−1 bar−1 and dye rejection with molecular weight cutoff (MWCO) of approximately 700 Da. Moreover, the versatile V/V−S method synthesizes two additional COF membranes (TpPa2Cl/Alumina and TpHz/Alumina) with different pore sizes and chemical environments. Adjusting the COF membrane thickness between 100–500 nm is achievable easily by varying the growth cycle numbers. Notably, TpPa2Cl/Alumina demonstrates excellent OSN performance in separating the model active pharmaceutical ingredient glycyrrhizic acid (GA) from dimethyl sulfoxide (DMSO), highlighting the method's potential for large-scale industrial applications.

alumina hollow fiber, covalent organic frameworks, loose nanofiltration, organic solvent nanofiltration, vapor/vapor-solid interfacial growth
1433-7851
Siow, Wei Jian Samuel
201631f9-883a-40ff-9eae-a69685895357
Chong, Jeng Yi
2f9ead94-86f2-4e20-9e67-75f10759555b
Ong, Jia Hui
8fcd78ea-21b0-4ef6-a5d4-bf5b2be2b80b
Kraft, Markus
0b4d3902-91df-4794-a4c4-ccc4901a40cd
Wang, Rong
1f58a88c-01ff-4941-857a-427ee8c8aa62
Xu, Rong
b8ecfd39-2f53-48e3-b672-e268c43f7db4
Siow, Wei Jian Samuel
201631f9-883a-40ff-9eae-a69685895357
Chong, Jeng Yi
2f9ead94-86f2-4e20-9e67-75f10759555b
Ong, Jia Hui
8fcd78ea-21b0-4ef6-a5d4-bf5b2be2b80b
Kraft, Markus
0b4d3902-91df-4794-a4c4-ccc4901a40cd
Wang, Rong
1f58a88c-01ff-4941-857a-427ee8c8aa62
Xu, Rong
b8ecfd39-2f53-48e3-b672-e268c43f7db4

Siow, Wei Jian Samuel, Chong, Jeng Yi, Ong, Jia Hui, Kraft, Markus, Wang, Rong and Xu, Rong (2024) Vapor/vapor-solid interfacial growth of covalent organic framework membranes on alumina hollow fiber for advanced molecular separation. Angewandte Chemie - International Edition, 63 (32), [e202406830]. (doi:10.1002/anie.202406830).

Record type: Article

Abstract

Covalent organic frameworks (COFs), known for their chemical stability and porous crystalline structure, hold promises as advanced separation membranes. However, fabricating high-quality COF membranes, particularly on industrial-preferred hollow fiber substrates, remains challenging. This study introduces a novel vapor/vapor-solid (V/V−S) method for growing ultrathin crystalline TpPa-1 COF membranes on the inner lumen surface of alumina hollow fibers (TpPa-1/Alumina). Through vapor-phase monomer introduction onto polydopamine-modified alumina at 170 °C and 1 atm, efficient polymerization and crystallization occur at the confined V−S interface. This enables one-step growth within 8 h, producing 100 nm thick COF membranes with strong substrate adhesion. TpPa-1/Alumina exhibits exceptional stability and performance over 80 h in continuous cross-flow organic solvent nanofiltration (OSN), with methanol permeance of about 200 L m−2 h−1 bar−1 and dye rejection with molecular weight cutoff (MWCO) of approximately 700 Da. Moreover, the versatile V/V−S method synthesizes two additional COF membranes (TpPa2Cl/Alumina and TpHz/Alumina) with different pore sizes and chemical environments. Adjusting the COF membrane thickness between 100–500 nm is achievable easily by varying the growth cycle numbers. Notably, TpPa2Cl/Alumina demonstrates excellent OSN performance in separating the model active pharmaceutical ingredient glycyrrhizic acid (GA) from dimethyl sulfoxide (DMSO), highlighting the method's potential for large-scale industrial applications.

This record has no associated files available for download.

More information

Accepted/In Press date: 10 April 2024
e-pub ahead of print date: 24 May 2024
Published date: 5 August 2024
Additional Information: Publisher Copyright: © 2024 Wiley-VCH GmbH.
Keywords: alumina hollow fiber, covalent organic frameworks, loose nanofiltration, organic solvent nanofiltration, vapor/vapor-solid interfacial growth

Identifiers

Local EPrints ID: 493024
URI: http://eprints.soton.ac.uk/id/eprint/493024
ISSN: 1433-7851
PURE UUID: 24b7479e-4cda-4d63-b7ca-eaa007d6abf6
ORCID for Jeng Yi Chong: ORCID iD orcid.org/0000-0002-0593-6313

Catalogue record

Date deposited: 21 Aug 2024 17:19
Last modified: 22 Aug 2024 02:10

Export record

Altmetrics

Contributors

Author: Wei Jian Samuel Siow
Author: Jeng Yi Chong ORCID iD
Author: Jia Hui Ong
Author: Markus Kraft
Author: Rong Wang
Author: Rong Xu

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×